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PC912XDP512F0CALR Datasheet(PDF) 281 Page - Freescale Semiconductor, Inc

Part # PC912XDP512F0CALR
Description  HCS12X Microcontrollers
PDF  1348 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

PC912XDP512F0CALR Datasheet(HTML) 281 Page - Freescale Semiconductor, Inc

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Chapter 6 XGATE (S12XGATEV2)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor
281
Operation
RD – IMM8:$00
⇒ RD
Subtracts a signed immediate 8 bit constant from the content of high byte of register RD and using binary
subtraction and stores the result in the high byte of destination register RD. This instruction can be used
after an SUBL for a 16 bit immediate subtraction.
Example:
SUBL
R2,#LOWBYTE
SUBH
R2,#HIGHBYTE
; R2 = R2 - 16 bit immediate
CCR Effects
Code and CPU Cycles
SUBH
Subtract Immediate 8 bit Constant
(High Byte)
SUBH
NZ
V
C
∆∆∆∆
N:
Set if bit 15 of the result is set; cleared otherwise.
Z:
Set if the result is $0000; cleared otherwise.
V:
Set if a two´s complement overflow resulted from the operation; cleared otherwise.
RD[15]old & IMM8[7] & RD[15]new | RD[15]old & IMM8[7] & RD[15]new
C:
Set if there is a carry from the bit 15 of the result; cleared otherwise.
RD[15]old & IMM8[7] | RD[15]old & RD[15]new | IMM8[7] & RD[15]new
Source Form
Address
Mode
Machine Code
Cycles
SUBH RD, #IMM8
IMM8
1
1
0
0
1
RD
IMM8
P



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